Kramer Electronics VS-5x5 - Manual (Page 15)

12 VS-5x5 - Controlling via RS-232 and RS-485
6 Controlling via RS-232 and RS-485
You can cascade up to 8 VS-5x5 units with control from a PC or serial controller.
To cascade up to 8 individual VS-5x5 units, via RS-232 and RS-485, do the
following:
1. Connect the composite video sources and acceptors, as well as the
appropriate stereo audio sources and acceptors, as Section 5.4 describes.
2. Connect the RS-232 port on the first VS-5x5 unit to the PC using the
null-modem adapter provided with the machine (recommended), as
described in Section 5.2 .
Alternatively, the RS-485 port could be used for PC control (instead of RS-232)
3. Connect the RS-485 terminal block port on the first VS-5x5 unit to the
RS-485 port on the second VS-5x5 unit and so on, connecting all the
RS-485 ports as described in Section 5.3 .
4. Set the DIP-switches, as described in Section 5.5 . In particular:
ƒ
Set the first VS-5x5 unit as MACHINE # 1 and the following 7 VS-5x5
units as MACHINE # 2 to MACHINE # 8
ƒ Set DIP 8 ON at the first and last VS-5x5 units (terminating the RS-485
line at 120
Ω). Set DIP 8 OFF at the other VS-5x5 units
ƒ Set DIP 5 to OFF for an external vertical interval source (factory
default) or ON for an input #1 (or programmable – see Section 11
instruction # 7) vertical interval source
ƒ Set DIP 6 and DIP 7 OFF on all VS-5x5 units